As one of its daily deals, Best Buy via eBay offers the Sharp Plasmacluster Ion Air Purifier with HEPA Filter, model no. FPA60UW, for $99.99. Choose in-store pickup to dodge the $28.76 shipping fee. That's $50 under our mention from last September and the best price we've seen. (It's a current low by $111.) It features a True HEPA filter, which purports to capture 99.97% of pollen, dust, pet dander, and smoke, three fan speeds, and it purifies up to a 341 square foot area. Deal ends today.